C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Total Timing for LT1

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Old Dec 26, 2003 | 11:24 AM
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From: stop the fun suckers
Default Total Timing for LT1

I noticed the stock program has timing going up to 42* or something high.. and my modified table has it going as high as 46* this sounds pretty high..

I remeber in the old Crab/HEI days most cars like about 36-38* total timing.. are LT1's that different? if so is it because of the reverse flow cooling or jsut the distributorless ignition..
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Old Dec 26, 2003 | 07:13 PM
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Default Re: Total Timing for LT1 (BluByU)

To determine total timing look at the 90-100 MAP Kpa settings. My car registers 41* at 90-95 MAP Kpa, and 39* at 100 MAP Kpa.
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Old Dec 29, 2003 | 08:39 AM
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From: stop the fun suckers
Default Re: Total Timing for LT1 (STL94LT1)

So you found your car (LT1) likes 41* total advance? That is still somehwat higher than the old days when most chevy small blocks liked 36-38* total..

That I'm really tring to do is figure out how much advance the car likes.. it doesnt retard the timing at my current numbers. However, I read somepace than more timing is not always better.. and adding more cubes, higher compression and bigger cam usually requires the timing to be retarted a bit.. not advanced from the stock program like mine.
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Old Dec 29, 2003 | 08:47 AM
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Default Re: Total Timing for LT1 (BluByU)

Also my car is running 11:1 compression with no spark retard. Every car is different, just find out what timing your car likes. I did my final WOT tuning on a DynoJet with a wide band o2.
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Old Dec 30, 2003 | 01:25 AM
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Default Re: Total Timing for LT1 (STL94LT1)

with 11.2 compression in my 396 LT-1 I get 41 degrees advance at WOT
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